GB2033567A - Pressure vessel - Google Patents

Pressure vessel Download PDF

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Publication number
GB2033567A
GB2033567A GB7936939A GB7936939A GB2033567A GB 2033567 A GB2033567 A GB 2033567A GB 7936939 A GB7936939 A GB 7936939A GB 7936939 A GB7936939 A GB 7936939A GB 2033567 A GB2033567 A GB 2033567A
Authority
GB
United Kingdom
Prior art keywords
collar
cask
outlet
pressure
vessel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7936939A
Other versions
GB2033567B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alumasc Grundy Ltd
Original Assignee
Grundy Teddington Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Grundy Teddington Ltd filed Critical Grundy Teddington Ltd
Priority to GB7936939A priority Critical patent/GB2033567B/en
Publication of GB2033567A publication Critical patent/GB2033567A/en
Application granted granted Critical
Publication of GB2033567B publication Critical patent/GB2033567B/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/14—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of aluminium; constructed of non-magnetic steel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0614—Single wall
    • F17C2203/0617—Single wall with one layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0646—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0305—Bosses, e.g. boss collars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/221—Welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/035—High pressure (>10 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/011—Improving strength

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

A pressure vessel having a bung hole outlet 13 with a collar 11 therein with the inner surface of the outlet and outer surface of the collar profiled to resist blow-out of the collar or fracture at the junction of the outlet and collar. <IMAGE>

Description

SPECIFICATION Pressure vessel This invention relates to vessels for containing fluids at high pressure, such as cask-like vessel of aluminium or aluminium alloy for containing liquid petroleum gas.
In the conventional method of manufacture the vessel has an inlet/outlet aperture in which an internally threaded collar is secured by welding. The weld is made around the lower portion of the collar and tests have shown that metal fatigue occurs at the weld after a number of cycles of use below a desideratum.
The object of the invention is to provide a pressure vessel having a bung hole collar, in which the possibility of the collar beocming detached from the outlet is minimised and in which the vessel complies with set safety standards.
According to this invention there is provided a cask primarily for containing gases at high pressure, said cask having a bung hole outlet which is out-swaged to provide an upstanding sleeve and a collar having a flared or flanged portion at its lower end and profiled to fit into the said outlet the collar being welded to the sleeve at the upper extremities.
Thus the outlet can comprise a substantially cylindrical portion merging to an outwardly flared lower portion the collar being profiled in accordance therewith.
The arrangement is such that pressure within the vessel forces the flared orflanged portion against the vessel surface so that the weld is substantially relieved of load due to the pressure.
Reference will now be made to the accompanying drawings.
In Figure 1, one conventional form of bung hole outlet is illustrated. The cask 10 is formed with an aperture in which a collar 11 is secured by a welding 12. The lower surface of the collar is substantially co-planar with the inner surface of the cask.
Figure 2 shows another conventional arrangement, generally similarto Figure 1, but the collar 11 has a radially extending flange 1 the edge of which is welded at 12a to the adjacent aperture edge.
Referring now to Figure 3, the cask outlet is out-swaged at 13, merging with the upper cask surface by curvilinear portions 14. The collar 11 is profiled to engage in the outlet so formed and has a lower portion 1 ib which is flared so as to bear on the inner cask surface below the curvilinear portions.
The collar is welded at 1 2b to the top of the out-swaged portion.
As an example, aluminium casks or pressure vessels to contain liquid petroleum gas at maximum working pressure of 450 1 b/in2 should withstand 10,000 cycles of test at 1.5 times working pressure.
Tests have shown that casks manufactured according to this invention are capable of well exceeding the required cyclic test.
It will be understood that the casks are manufactured from welded up sections, the collar being inserted from below the bung hole.
1. A cask primarily for containing gases at high pressure, said cask having a bung hole outlet which is out-swaged to provide an uptstanding sleeve and a collar having a flared or flanged portion at its lower end and profiled to fit into the said outlet the collar being welded to the sleeve at the upper extremities.
2. A cask as claimed in claim 1, wherein the outlet comprises a substantially cylindrical portion merging to an outwardly flared lower portion the collar being profiled in accordance therewith.
3. A cask primarily for containing a liquified gas under pressure, substantially as herein described with reference to Figure 3 of the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Pressure vessel This invention relates to vessels for containing fluids at high pressure, such as cask-like vessel of aluminium or aluminium alloy for containing liquid petroleum gas. In the conventional method of manufacture the vessel has an inlet/outlet aperture in which an internally threaded collar is secured by welding. The weld is made around the lower portion of the collar and tests have shown that metal fatigue occurs at the weld after a number of cycles of use below a desideratum. The object of the invention is to provide a pressure vessel having a bung hole collar, in which the possibility of the collar beocming detached from the outlet is minimised and in which the vessel complies with set safety standards. According to this invention there is provided a cask primarily for containing gases at high pressure, said cask having a bung hole outlet which is out-swaged to provide an upstanding sleeve and a collar having a flared or flanged portion at its lower end and profiled to fit into the said outlet the collar being welded to the sleeve at the upper extremities. Thus the outlet can comprise a substantially cylindrical portion merging to an outwardly flared lower portion the collar being profiled in accordance therewith. The arrangement is such that pressure within the vessel forces the flared orflanged portion against the vessel surface so that the weld is substantially relieved of load due to the pressure. Reference will now be made to the accompanying drawings. In Figure 1, one conventional form of bung hole outlet is illustrated. The cask 10 is formed with an aperture in which a collar 11 is secured by a welding 12. The lower surface of the collar is substantially co-planar with the inner surface of the cask. Figure 2 shows another conventional arrangement, generally similarto Figure 1, but the collar 11 has a radially extending flange 1 the edge of which is welded at 12a to the adjacent aperture edge. Referring now to Figure 3, the cask outlet is out-swaged at 13, merging with the upper cask surface by curvilinear portions 14. The collar 11 is profiled to engage in the outlet so formed and has a lower portion 1 ib which is flared so as to bear on the inner cask surface below the curvilinear portions. The collar is welded at 1 2b to the top of the out-swaged portion. As an example, aluminium casks or pressure vessels to contain liquid petroleum gas at maximum working pressure of 450 1 b/in2 should withstand 10,000 cycles of test at 1.5 times working pressure. Tests have shown that casks manufactured according to this invention are capable of well exceeding the required cyclic test. It will be understood that the casks are manufactured from welded up sections, the collar being inserted from below the bung hole. CLAIMS
1. A cask primarily for containing gases at high pressure, said cask having a bung hole outlet which is out-swaged to provide an uptstanding sleeve and a collar having a flared or flanged portion at its lower end and profiled to fit into the said outlet the collar being welded to the sleeve at the upper extremities.
2. A cask as claimed in claim 1, wherein the outlet comprises a substantially cylindrical portion merging to an outwardly flared lower portion the collar being profiled in accordance therewith.
3. A cask primarily for containing a liquified gas under pressure, substantially as herein described with reference to Figure 3 of the accompanying drawings.
GB7936939A 1978-10-27 1979-10-24 Pressure vessel Expired GB2033567B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7936939A GB2033567B (en) 1978-10-27 1979-10-24 Pressure vessel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7842173 1978-10-27
GB7936939A GB2033567B (en) 1978-10-27 1979-10-24 Pressure vessel

Publications (2)

Publication Number Publication Date
GB2033567A true GB2033567A (en) 1980-05-21
GB2033567B GB2033567B (en) 1983-05-18

Family

ID=26269352

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7936939A Expired GB2033567B (en) 1978-10-27 1979-10-24 Pressure vessel

Country Status (1)

Country Link
GB (1) GB2033567B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5356030A (en) * 1990-03-20 1994-10-18 Buedenbender Bernd Container having at least one filling opening with a threaded closure
US8602249B2 (en) * 2008-07-29 2013-12-10 Ncf Industries, Inc. Pressure vessel head with inverted neck

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5356030A (en) * 1990-03-20 1994-10-18 Buedenbender Bernd Container having at least one filling opening with a threaded closure
US8602249B2 (en) * 2008-07-29 2013-12-10 Ncf Industries, Inc. Pressure vessel head with inverted neck

Also Published As

Publication number Publication date
GB2033567B (en) 1983-05-18

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PCNP Patent ceased through non-payment of renewal fee